Sign enclosure



FIG. 1 is an isometric view of the sign enclosure;

FIG. 2 is an end view of the sign enclosure;

FIG. 3 is a top view of the sign enclosure;

FIG. 4 is a side view of the sign enclosure; and,

FIG. 5 is a bottom view of the sign enclosure. 

The ornamental design for a sign enclosure, as shown and described. 